City of Cabdrum

As City of Cabdrum enters the battlefield, you
may reveal a Undead card from your hand. If you
don't, City of Cabdrum enters the battlefield
tapped.
{t}: Add {c} to your mana pool.
{t}, Pay 1 life: Add {w}, {b}, {g} to your mana pool.
Some place are better unvisited.